Illumination panel
Patent 5036435 Issued on July 30, 1991. Estimated Expiration Date: 
May 21, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 21, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLight diffusing device Apparatus for the display of illuminated translucent documents Surface illumination device using optical conductors Patent #: 4845596 InventorsAssigneeApplicationNo. 525697 filed on 05/21/1990US Classes:362/554With optical fiber bundleExaminersPrimary: Ostrager, Allen M.Attorney, Agent or FirmInternational ClassF21V 007/04AbstractAn illumination panel, which comprises an optical fiber sheet formed by arranging a plurality of optical fibers having a core-sheath structure, which has one end optically connected to a light source and a light-leaking portion on at least one surface thereof, a surface panel arranged on the front surface side of the optical fiber sheet, and a reflecting layer arranged on the back surface side of the optical fiber sheet, wherein the light-leaking portion is formed of a plurality of flaws extending to the core of the optical fiber from the sheath thereof, the light-leaking width of the light-leaking portion increases toward the side far from the light source from the side near to the light source, the presence density of the flaws increases toward the side far from the light source from the side near to the light source, and the depth of the flaws increases toward the side far from the light source from the side near to the light source, whereby the entire illumination surface is uniformly illuminated.Field of SearchEdge illuminated modifier or light rod/pipe | |
